How to calculate moon day

In the lunar month, unlike the sun, which formed the basis of the calendar, 29.5 days. It begins with a full moon, then the moon is in the middle of the lunar month is full moon, the moon wanes and begins a new lunar month. There is a lunar calendar, which is easy to know what lunar day falls on a specific number. But if the lunar calendar for the desired year is not at hand, it is possible to make calculations on their own.

You will need

calculator (although, the calculations can be carried out in the mind), a sheet of paper and pen

Instruction

1

To calculate the lunar day for a specific number, you need to know:D – day of monthM – the ordinal number of the monthY – for example, you can take on 2 March 2020. For this numberD = 2M= 3Y =2020

2

To find out the lunar day, you will need to calculate the so-called lunar year number. Each year is a lunar number, for example, 2001 corresponds to the number 7, 2002 – 8, 2003 – 9, and so on. The lunar year number is incremented in order, and can be from 1 to 19. If the year number is 19, as for example, in 2013, the number next year is back to 1, etc. So, the number 2014 is 1.That is, if you count the number of lunar 2020 will be equal to 7. Denote it by L.

3

Now, to find out the lunar day, it remains only to substitute all numbers into formula:N=(L*11)-14+D+M.For the date March 2, 2020 preliminary result of the calculation will be: N=(7*11)-14+2+3=68.Why preliminary? Because the lunar month of 29.5 days. Therefore, you must repeatedly subtract 30 from the number until the result becomes less than 30. 68-30=38, subtract 30 again, turns 8. So, on March 2, 2020 will be the eighth lunar day.

Note

Lunar calendar by the hour is not the same as solar. New moon day is not 24:00, and some time for a Sunny day. Therefore, on March 2, 2020 in some time of the day, the eighth day of the moon will change the ninth.

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